6.25 android开发mvp模式,类似swift的jvm语言kotlin

本文详细介绍了MVP设计模式在Android应用开发中的实现方式，并通过一个登录界面的实例展示了Activity中的具体写法。同时，对比了MVP与MVC两种模式的区别。

mvp设计模式：

http://blog.youkuaiyun.com/lmj623565791/article/details/46596109

mvp与mvc的区别。

mvp模式，activity里的写法：

package com.zhy.blogcodes.mvp;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.zhy.blogcodes.R;
import com.zhy.blogcodes.mvp.bean.User;
import com.zhy.blogcodes.mvp.presenter.UserLoginPresenter;
import com.zhy.blogcodes.mvp.view.IUserLoginView;

public class UserLoginActivity extends ActionBarActivity implements IUserLoginView
{


    private EditText mEtUsername, mEtPassword;
    private Button mBtnLogin, mBtnClear;
    private ProgressBar mPbLoading;

    private UserLoginPresenter mUserLoginPresenter = new UserLoginPresenter(this);

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_login);

        initViews();
    }

    private void initViews()
    {
        mEtUsername = (EditText) findViewById(R.id.id_et_username);
        mEtPassword = (EditText) findViewById(R.id.id_et_password);

        mBtnClear = (Button) findViewById(R.id.id_btn_clear);
        mBtnLogin = (Button) findViewById(R.id.id_btn_login);

        mPbLoading = (ProgressBar) findViewById(R.id.id_pb_loading);

        mBtnLogin.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                mUserLoginPresenter.login();
            }
        });

        mBtnClear.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                mUserLoginPresenter.clear();
            }
        });
    }


    @Override
    public String getUserName()
    {
        return mEtUsername.getText().toString();
    }

    @Override
    public String getPassword()
    {
        return mEtPassword.getText().toString();
    }

    @Override
    public void clearUserName()
    {
        mEtUsername.setText("");
    }

    @Override
    public void clearPassword()
    {
        mEtPassword.setText("");
    }

    @Override
    public void showLoading()
    {
        mPbLoading.setVisibility(View.VISIBLE);
    }

    @Override
    public void hideLoading()
    {
        mPbLoading.setVisibility(View.GONE);
    }

    @Override
    public void toMainActivity(User user)
    {
        Toast.makeText(this, user.getUsername() +
                " login success , to MainActivity", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void showFailedError()
    {
        Toast.makeText(this,
                "login failed", Toast.LENGTH_SHORT).show();
    }
}

kotlin安装：

http://kotlinlang.org/docs/tutorials/getting-started.html

语言介绍：

http://kotlinlang.org/

一个hello world：

package hello

fun main(args: Array<String>) {
   println("Hello World!")
}